Scibus provides image text flow feature. This is how your text flows
naturally around image like you see in many publications. This is
reached by editing boundaries (Scribus calls it Contour Line) of an image. The text will automatically flow, following your boundaries form. Follow this example.

1. Create Text Boxes

To see this feature well, create two columns.

2. Create Image Frame

Place an image frame on center of two columns. Let the image as is for now. See picture below.